Khalil Rountree Jr.'s plan appeared to be working for a while at UFC 307, until Alex Pereira did what he usually does. The result: a fourth-round KO and further evidence that Pereira is a terrifying individual,

Alex Pereira picked up his fourth UFC title fight win in 11 months by stopping Khalil Rountree in the UFC 307 main event.

One of the most remarkable runs in UFC history continues, but after much more difficulty than expected. Alex Pereira methodically broke down a game Khalil Rountree Jr. and used a bruising sequence of body punches to retain his light heavyweight championship with a fourth-round stoppage Saturday night in the main event of UFC 307 at the Delta Center in Salt Lake City.